Preparation method of sewage sludge compound fertilizer

A manufacturing method and sludge technology are applied in the directions of sewage/sludge fertilizers, fertilizers made from biological wastes, organic fertilizers, etc., and can solve the problems of difficult survival and growth of crops, inconvenient storage and use, and inconvenience in popularization and application. To achieve the effect of improving soil fertility and cultivation performance, scientific formulation, convenient storage and use

Inactive Publication Date: 2015-03-18
蒋华
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of sludge solid fertilizer contains a large amount of strong alkaline substances such as lime powder or cement kiln powder, with a high pH value and strong corrosion. It is not convenient to store and use, and long-term large-scale use will lead to soil

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0006] Implementation

[0007] Examples to illustrate

[0008] Put 1000 kilograms of black liquor treatment sludge from the paper mill into the reactor, add industrial waste sulfuric acid without heavy metal ions and pass it into the boiler tail gas to be heated to 85°C, while stirring the reactant, control its pH to about 2, continue to keep warm Stir for about 45 minutes. After it is fully acidified and hydrolyzed, 350 kg of tailing powder containing 60% silica, 15% calcium oxide, 6% potassium oxide, 4% phosphorus pentoxide, 0.3% magnesium oxide and other trace elements are added. 150 kilograms of shell powder and 200 kilograms of ammonium chloride. After being kept warm and evenly stirred, the lime powder was added to adjust the pH to about 6. Then, put the above-mentioned mixture into a dryer for heating and drying, and its water content is controlled below 18%, and finally enter the granulator for granulation, after measuring, packaging and storage.

[0009] Compared with the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of a sewage sludge compound fertilizer. The preparation method of the sewage sludge compound fertilizer mainly comprises the following steps: adding industrial waste acid into urban domestic sludge or industrial sludge which is sterilized and disinfected by a conventional method to adjust the pH value to a range of 0.5-3, heating the sludge to 60-90 DEG C, and carrying out acidization hydrolysis under continuously stirring for 45-60 minutes; then respectively adding ore powder which accounts for 60-70% of the total weight of the sludge and contains silicon, phosphorus, calcium, magnesium, potassium and other trace elements, rice husk powder or sawn wood powder which accounts for 10-25% of the total weight of the sludge and an inorganic ammonia salt compound which accounts for 10-25% of the total weight of the sludge; preserving heat and uniformly stirring, adjusting the pH value to be neutral by using lime alkaline substances; and heating and drying the mixture and controlling the content of water in the mixture to be smaller than 18%, and prilling, metering and packing the mixture to prepare the sewage sludge compound fertilizer.

Description

Technical field [0001] The invention relates to a manufacturing process for manufacturing agricultural fertilizers from sewage sludge or similar substances, in particular to a manufacturing method for urban or industrial sludge compound fertilizer. Background technique [0002] At present, with the continuous development of industrialization and the continuous improvement of people's daily life, the environmental pollution problem in my country's vast urban and rural areas and market towns has become more and more serious. One of the most important pollution is the discharge of urban domestic wastewater and industrial wastewater. Although some new technologies and new processes have been promoted and applied in the treatment and recycling of this type of wastewater, the large amount of sludge left over is still a difficult and urgent problem to be solved. These sludge contains a large number of organic compounds and other toxic inorganic substances. At the same time, it also con...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C05G1/00C05F7/00
CPCC05C3/00C05G1/00C05D3/02C05F5/002C05F7/00Y02A40/20
Inventor 蒋华
Owner 蒋华
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap